It’s just one night? Would you use the kitchen and W/D of the 1BR? If not, the question becomes whether it’s worth an extra 10 points or so to be able to keep a (possibly sleeping) baby in a stroller for a walk back to BLT vs taking the monorail or boat launch back.
If you’ve got points to spare, BLT would probably be a bit easier. Especially if you think you might need to leave in the middle of the party. But we’ve done small child and stroller back to poly and GF several times and it’s always been very manageable.